How to predict drive number change for 7.3->8.1 upgrade?
Marat N.Afanasyev
amarat at ksu.ru
Fri Sep 17 13:04:35 UTC 2010
Michael Sperber wrote:
>
> Oliver Fromme<olli at lurza.secnetix.de> writes:
>
>> Michael Sperber<sperber at deinprogramm.de> wrote:
>> > I just upgraded my desktop system from 7.3 to 8.1, and the main hard
>> > drive, which was /dev/ad6 before is now /dev/ad10. Consequently, the
>> > initial boot failed when trying to mount the root file system from ad6.
>> >
>> > The desktop system is now fixed, but I also have a rented server with
>> > only a serial console, and I worry that the upgrade is going to leave me
>> > with a dead machine. Is there any way to predict how the drive number
>> > changes? (Why does it change at all?) If so, what's the proper way to
>> > tell the system the initial root device *before* rebooting?
>>
>> Remove "options ATA_STATIC_ID" from your kernel config
>> before building the new kernel and rebooting. Then your
>> first disk will be ad0, no matter what controller and
>> channel it is connected to. Be sure to update your
>> /etc/fstab file.
>
> Ah, excellent - that's what I was looking for. Thanks!
>
beware of drago^Wchanging of adX numbers each time you add/remove drive
;) It's better to label filesystems, imho ;)
--
SY, Marat
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